CK 625 then AA 603 at O'Hare
Seattle (SEA) → Chicago → Washington National
Timetable, Chicago time
17:00CK 625 from Seattle (SEA) at the gate
16:51AA 603 to Washington National leaves the gate
23 h 51 apart on the timetable, overnight
AA 603 leaves 23 h 51 after CK 625 arrives on the timetable: more than half a day, so not a connection we count.